Improvement in rotary harrows



rotating when striking a stone, stump, or other impediment, as well as amore thorough breaking up diluted seas are fitflyiirr.

Letters Patent No. 107,337, dated September 13, 1870.

liMPROVZEiMBNT IN ROTARY HARROWS'.

The Schedule referred to in these Letters Patent and making .part of thesame. I

To all whom it may concern.-

Be it known that I, GEORGE COLLINS, of Fremont, in the county of Dodgeand State of Nebraska, have invented anew and useful Improvement inRotary Harrows; and I dohereby declare that the follow ing is a full,clear, and exact description of the .con stru'ction and operation ofthesame, reference being bad to the accompanying drawing making a partof this specification, in which Figure 1 is a plan view.

Figure 2 is a front elevation.

Figure 3 is a sectionalview, in detail, of couplingbar, showing theconnection of brace therewith.

Like letters in the different figures of the drawing indicate likeparts. g

,My invention relates to a rotary harrow, having for its object theavoidingof resistance by the harrow and leveling of the soil, andconsists in a combination and arrangement of devices as will behereinafter fully described. I I

' A A'areliarrows.

B, a coupling-bar, arranged to connect at each end with a pivot-screw,a, projecting upwardly in the center of each barrow.

O O are braces, arranged one at each end of the coupling-bar, to connectwith the pivot-screws, so as form a steady bearing for the latter, whichare passed through the underside of the harrows, where the center beamsintersect one another at right angles, and fastened rigidly thereto.

The braces are fastened to the coupling-bar by bolts and screw-nuts, thebolts passing through elongated slots 1) b in the coupling-bar.

The object of the slots is to give tothe axis of the harrows an angularposition with the vertical, so that the barrows may be made to rotateeither way.

I) is the tongue, having an opening cut transversely on its upper sidenear therear cnd,and a spring plate, 0, arranged over the opening, andattached, by a screw or otherwise, a little forward of it.

The tongue is attached to the coupling-bar by rais- 'ing thespring-plate up and placing the tongue so that the opening will embracethe coupling-bar; the opening is made loose enough to allow the tongueto slide laterally therein either way; the spring plate .prevents itfrom becoming detached from the bar.

The tongue is further secured by the braces E E, one oneach side,arranged with additional braces at their rear ends, F F, to connect withthe pivot-screws.

The forward endslof the braces E E intersect one another on the tongue,and are secured thereto by a pivot-screw, d. This arrangement of thetongnewith the coupling-bar and braces E E allows it to have a lateralmovement either way, thus avoiding any too sudden or abrupt stralnvuponthe team bythe barrow striking a stump or other impediment, as wellasfacilitating the rotating of the harrow in avoiding the latter.

The coupling-bar is bowed from end to end, so as to elevate the tonguesufficiently to keep the draft from I the neck of the horse.

The braces 1 F are riveted or otherwise fastened to the braces E E,which latter are placed over the pivot-screws first, and then the endsof the couplingbar next, with the braces G O of the latter under thoseof the former, and the whole. then secured by screwnnts e c.

Having thus fully described my invention,

What I. claim therein as new, and desire to secure by Letters Patent,is-

The arrangement of coupling-bar B, provided with movable or adjustablebraces C O, braces- E F and E F,-tongue- I), having its rear endarranged as described, and pivot-screws a a of theharrows A A,substantially as shown and set forth.

As evidence that I claim the foregoing as my invention,.1 have hereuntoset my hand and seal in the presence of two witnesses.

' GEORGE COLLINS. [n. s.]

Witnesses:

T. S. Cox, N. M. Prnsn'onv.

